<template>
  <div id="detail">
    <detail-nav-bar class="detail-nav" @titleClick="titleClick" ref="nav"></detail-nav-bar>
    <scroll class="content" ref="scroll" :probe-type="3" @scroll="contentScroll">
      <detail-swiper :top-images="topImages"></detail-swiper>
      <detail-base-info :goods="goods"></detail-base-info>
      <detail-shop-info :shop="shop"></detail-shop-info>
      <detail-goods-info :detail-info="detailInfo" @imageLoad="imageLoad"></detail-goods-info>
      <detail-param-info ref="params" :param-info="paramInfo"></detail-param-info>
      <detail-comment-info ref="comment" :comment-info="commentInfo"></detail-comment-info>
      <goods-list ref="recommend" :goods="recommends"></goods-list>
    </scroll>
    <detail-bottom-bar @addCart="addToCart"></detail-bottom-bar>

    <back-top @click.native = "backClick" v-show="isShowBackTop"></back-top>
    <!-- <toast :message="message" :show="show"></toast> -->
  </div>
</template>

<script>
  import DetailNavBar from './childComps/DetailNavBar'
  import DetailSwiper from './childComps/DetailSwiper'
  import DetailBaseInfo from './childComps/DetailBaseInfo'
  import DetailShopInfo from './childComps/DetailShopInfo'
  import DetailGoodsInfo from './childComps/DetailGoodsInfo'
  import DetailParamInfo from './childComps/DetailParamInfo'
  import DetailCommentInfo from './childComps/DetailCommentInfo'
  import DetailBottomBar from './childComps/DetailBottomBar'

  import Scroll from 'components/common/scroll/Scroll'
  import GoodsList from 'components/content/goods/GoodsList'
  // import Toast from 'components/common/toast/Toast'

  import {getDetail, Goods, Shop, GoodsParam,  getRecommend} from 'network/detail'
  import {debounce} from "common/utils"
  import {itemListenerMixin, backTopMixin} from 'common/mixin'

  import { mapActions } from 'vuex'


  export default{
    name: 'Detail',
    components: {
      DetailNavBar,
      DetailSwiper,
      DetailBaseInfo,
      DetailShopInfo,
      DetailGoodsInfo,
      DetailParamInfo,
      DetailCommentInfo,
      DetailBottomBar,
      Scroll,
      GoodsList,
      // Toast
    },
    mixins: [itemListenerMixin, backTopMixin],
    data() {
      return {
        iid: null,
        topImages: [],
        goods: {},
        shop: {},
        detailInfo: {},
        paramInfo: {},
        commentInfo: {},
        recommends: [],
        themeTopYs: [],
        currentIndex: 0,
        // message: '',
        // show: false
      }
    },
    created() {
      // 1.保存传入的iid
      this.iid = this.$route.params.iid

      // 2.根据iid请求详情数据
      getDetail(this.iid).then(res => {
        // 1.获取顶部的图片轮播数据
        const data = res.result;
        this.topImages = data.itemInfo.topImages;

        // 2.获取商品信息
        this.goods = new Goods(data.itemInfo, data.columns, data.shopInfo.services)

        // 3.创建店铺信息的对象
        this.shop = new Shop(data.shopInfo)

        // 4.保存商品的详情数据
        this.detailInfo = data.detailInfo; 

        // 5.获取参数的信息
        this.paramInfo = new GoodsParam(data.itemParams.info, data.itemParams.rule) 

        // 6.取出评论信息
        if (data.rate.cRate !== 0) {
          this.commentInfo = data.rate.list[0]
        }
      })
       
        // 7.请求推荐数据
        getRecommend().then(res => {
          this.recommends = res.data.list
        })

        // 4.给getThemeTopY赋值(对给this.themeTopYs赋值的操作进行防抖)
        this.getThemeTopY = debounce(() => {
          this.themeTopYs = []

          this.themeTopYs.push(0);
          this.themeTopYs.push(this.$refs.params.$el.offsetTop)
          this.themeTopYs.push(this.$refs.comment.$el.offsetTop)
          this.themeTopYs.push(this.$refs.recommend.$el.offsetTop)
          this.themeTopYs.push(Number.MAX_VALUE)
        }, 100)
    },
    mounted() {
     
    },
    destroyed() {
      this.$bus.$off('itemImageLoad', this.itemImgListener)
    },
    methods: {
      // 将vux中的方法映射到组件中
      ...mapActions(['addCart']),
      imageLoad() {
        this.newRefresh()
        this.getThemeTopY()
      },
      titleClick(index) {
        this.$refs.scroll.scrollTo(0, -this.themeTopYs[index], 200)
      },
      contentScroll(position) {
        // 1.获取y值
        const positionY = -position.y

        // 2.positionY和主题中进行对比
        let length = this.themeTopYs.length
        for(let i = 0; i < length - 1; i++) {
          // if(positionY > this.themeTopYs[parseInt(i)] && positionY < this.themeTopYs[parseInt(i) + 1]) {
          //   console.log(i)
          // }

          if(this.currentIndex !== i && (positionY >= this.themeTopYs[i] && positionY <
          this.themeTopYs[i + 1])) {
            this.currentIndex = i;
            this.$refs.nav.currentIndex = this.currentIndex
          }

          // if(this.currentIndex !== i && ((i < length - 1 && positionY >= this.themeTopYs[i] && positionY < 
          // this.themeTopYs[i + 1]) || (i === length - 1 && positionY >= this.themeTopYs[i]))){
          //   this.currentIndex = i;
          //   this.$refs.nav.currentIndex = this.currentIndex
          // }

          // 3.是否显示回到顶部
          this.listenShowBackTop(position)
        }
      },
      addToCart() {
        // 1.获取购物车需要展示的信息
        const product = {}
        product.image = this.topImages[0];
        product.title = this.goods.title; 
        product.desc = this.goods.desc;
        product.price = this.goods.realPrice
        product.iid = this.iid

        // 2.将商品添加到购物车里
        // this.$store.commit('addCart', product)
        // this.$store.dispatch('addCart', product).then(res => { // 想要知道vuex里面完成了某个操作,就要用promise
        //   console.log(res);
        // })

        // vux已映射的方法 ...mapActions  
        this.addCart(product).then(res => {
          // this.show = true;
          // this.message = res;

          // setTimeout(() => {
          //   this.show = false;
          //   this.message = ''
          // }, 1500)

          // this.$toast.show()
          this.$toast.show(res, 2000)
        })
      }
    }
  }
</script>

<style scoped>
  #detail {
    position: relative;
    z-index: 9;
    background-color: #fff;
    height: 100vh;
  }

  .detail-nav {
    position: relative;
    z-index: 9;
    background-color: #fff;
  }

  .content {
    height: calc(100% - 44px - 49px);
  }
</style>
